Right now i use Verdana font, which is embedded in Windows and MacOS, but doesn't exist in Linux. It is why on Linux another system font is picked up, which looks a little bit different.
Either use standard for all OS font, like SansSerif (keep in mind that 13 font size isn't available by default in Fedora OS) or embed font in javafx app and use it to get the same appearance in all OS.
Right now i use Verdana font, which is embedded in Windows and MacOS, but doesn't exist in Linux. It is why on Linux another system font is picked up, which looks a little bit different.
Either use standard for all OS font, like SansSerif (keep in mind that 13 font size isn't available by default in Fedora OS) or embed font in javafx app and use it to get the same appearance in all OS.